She chronicles road openings, road closures, accidents, weather, bear sightings and anything else on the road, which stretches from the northern edge of Glendora north to East Fork Road, way up in the San Gabriel Mountains.

She started the blog in 2007 after she started riding her bicycle on the road with her husband, Bill.

At first, she was primarily seeking a way to stay fit.

"After a while, it's not about the calories, it's about the people you meet, your interactions with the denizens of the forest and your interface with the people up there," she said.

Linked on McCusker's Glendora Mountain Road site are dozens of other blogs written by like-minded friends.

For videos and photographs of wild animals living in the forest, a reader can click over to the Parliament Of Owls blog.

For chronicles of the area's most friendly bike rider, check out the link to Mr. Beanz and his Bike Rides blog.

Although McCusker loves the road's views, she also chronicles its wild side.

Within the past year, a horse and bicyclist were killed on the road.

A rider knocked off his horse by a car last year is still scared to go up in the area, said Dottie Hilliard, a member of an equestrian group.

The horse was euthanized.

"Ever since then, with that gentleman, he's just terrified to ride up there," Hilliard said. "It's a trauma."

The riders do all they can to stay off the road, only venturing onto the black top at bottlenecks and bridges, she said.

"It's really scary," Hilliard said.

The road is full of hairpin turns, climbs and steep descents, making it a popular course for thrill seekers who like to test the limits of their skills and vehicles.

When there's a crash on Glendora Mountain Road, the description almost always tells how far the car fell before it came to a rest at the bottom of some steep canyon.

In 2009, investigators used a YouTube video of a car crash on Glendora Mountain Road to crack an insurance-fraud case that was filed after one of the racers crashed his car.